Ring Size Conversion Chart
Find your ring size
Finding the right ring size should feel simple. Whether you’re choosing a ring for yourself or selecting something special for someone else, there are two easy ways to find your size: measure a ring you already own that fits well, or measure your finger directly. Once you have your measurement, use our ring size conversion tool or size chart to find your approximate UK/IE ring size and international equivalents. Our guide will walk you through each step, helping you measure with confidence and find your closest fit.
A. Measure a ring you already own
Have a ring that fits you well? Start by measuring the inside diameter of the ring. Measure straight across the inside, from one inner edge to the other, then use your measurement to find your closest ring size.
B. Measure your finger
No ring to measure? You can measure your finger using a strip of paper or a piece of string. Wrap it around the base of your finger, mark where the ends meet, then measure the length in millimetres. This gives you your approximate circumference.
For the best fit
For a more accurate measurement, measure your finger at the end of the day, when your fingers are at their largest.
Avoid measuring when your hands are particularly cold or hot.
Convert your measurement to a ring size
Once you have your inside diameter or circumference measurement, use our conversion tool or refer to the ring size chart below
to find your approximate UK/IE ring size and international equivalents.
Conversion tool
Once you have your inside diameter or circumference measurement, enter it below to find your UK/IE ring size and international equivalents. Simply select the type of measurement you have and enter it in millimetres. The tool will then show your closest ring size.
What measurement do you have?Your approximate UK/IE ring size
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UK / IE
This tool provides an approximate size based on the measurement entered. For the best fit, please refer to our full size guide.
Between sizes?
If your measurement falls between two sizes, we generally recommend choosing the larger size, particularly for wider bands or if you prefer a little more room.
Ring fit can vary depending on the width and design of the ring. Wider bands may feel slightly tighter than narrower rings in the same size.
Prefer to have your size measured in store?
If you are unsure which size to choose, our team can measure your finger in store and help you find the right fit.
Visit us at McDowells, 3 O'Connell Street Upper, Dublin 1, and our team will be happy to help.